Ok I have a problem here. I will sit for the NCLEX in 3 days. I am practicing NCLEX questions with the Kaplan Qbank. I had no problem with dosage calculation until I came up with these two questions:
First I came up with this question:
The nurse receives an order to administer phenobarbital (Luminal) gr ii PO to a 3-year-old child. The label on the multidose vial reads 160 mg/5 cc. How many cc of phenobarbital should the nurse administer? Type the correct answer into the blank.
When you do the math, the result is 3.75 cc which is what I answered. But the correct response was 3.8 cc. Si I figured OK I had to round the result.
But then I came up to this question:
The nurse dilutes a 2-g vial of cefazolin (Ancef) with 3 mL of diluent to yield a volume of 3.2 mL. How many mL should the nurse administer if the physician orders 550 mg IM? Type the correct answer in the blank.
So after doing the math I came up with the result 0.88 ml, so (because of the previous question) I rounded it up and answered 0.9 ml. But the correct response was 0.88 ml!
It doesn't make sense. Am I missing something? Is it a mistake from the Qbank? What is the rule for the NCLEX, do I have to round cc and ml or not (obviously you have to round drops), if so, when?